// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/callback_helpers.h"

#include "base/callback.h"

namespace base {

ScopedClosureRunner::ScopedClosureRunner() { }

ScopedClosureRunner::ScopedClosureRunner(const Closure& closure)
    : closure_(closure)
{
}

ScopedClosureRunner::~ScopedClosureRunner()
{
    if (!closure_.is_null())
        closure_.Run();
}

ScopedClosureRunner::ScopedClosureRunner(ScopedClosureRunner&& other)
    : closure_(other.Release())
{
}

ScopedClosureRunner& ScopedClosureRunner::operator=(
    ScopedClosureRunner&& other)
{
    ReplaceClosure(other.Release());
    return *this;
}

void ScopedClosureRunner::RunAndReset()
{
    Closure old_closure = Release();
    if (!old_closure.is_null())
        old_closure.Run();
}

void ScopedClosureRunner::ReplaceClosure(const Closure& closure)
{
    closure_ = closure;
}

Closure ScopedClosureRunner::Release()
{
    Closure result = closure_;
    closure_.Reset();
    return result;
}

} // namespace base
